The occult has had a very big influence on music from the 1960s onward, for the same reason it was partly responsible for inventing hippies. The Beatles famously put Aleister Crowley on the cover of Sgt. Pepper. Led Zeppelin's Jimmy Page was a very serious occultist and fan of Crowley's; Ozzy Osbourne much less serious, but liked to use occult themes in his music. Bob Dylan made heavy use of the I Ching. A large number of the British and American folk and folk-rock scene were into magic, wicca, and neo-paganism. And modern rappers like Jay Z like to make a lot of use occult symbolism from the Freemasons and the Illuminati in their music (though to my knowledge Jay Z is not a mason).